there are a lot of things that can start a dog spinning. Does she seem to chase her tail? If so, she may have pain in the tail itself, or in the low back. Does she change direction, or is it always in the same direction? She may be experiencing vertigo, which can be addressed medically. Has she ever shown this before? that will tell us if it's a behavioral situation. Let me know, and we'll go from there! Is this dog from our kennel?